International audienceThe study of interaction and exchange among different geographic areas in the Western Pacific occupied by Lapita people (3500-2500 BP) has been an important component of research into the colonization process of the Pacific region. The Western Solomon Islands, lying in the central area of the Lapita distribution, have a unique archaeological record presenting intertidal sites with Late/Post Lapita ceramics as the only material evidence of Lapita occupation. Previous studies have indicated that Lapita ceramic production was mainly local. However, temper analysis has identified exotic ceramics in Late Lapita sites in the New Georgia Group, indicating complex ceramic transfer including from outside the Solomon Islands region. Analysis of Late Roviana (New Georgia) and historic period ceramic sherd temper has also suggested ceramic transfer from the nearby island of Choiseul, where ceramics were manufactured until recent times. Here we present results of a series of portable X-ray fluorescence and Scanning Electron Microscopy analyses carried out on ceramic pastes from the New Georgia group in the Western Solomon Islands. These results confirm that during the Early (Lapita/Post Lapita) ceramic period, production was present at multiple locations and that ceramics were transferred at different geographic scales involving occasional long-distance interactions. During the later period (AD 1400-1900) ceramic production had a more restricted occurrence with transfer networks changing and receding to become exclusively regional